John c



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J. 0. FRIEDMANN.

POCKET KNIFE.

Patented Apr. 26, 1887.

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UNITED STATES.

PATENT OFFICEQ JOHN C. FRIEDMANN, OF NEW YORK, N. Y.

POCKET-KNIFE.

SPECIFICATION forming part of Letters Patent No, 361,755, dated April 26, 1887.

Application filed July 23, 1886. Serial No. 208,831. (No model.)

To all whom it may concern.-

Be it known that I, JOHN G. FRIEDMANN, a resident of New York city, in the county and State of New York, have invented an Improvement in Pocket-Knives, of which the following is a full,clear, and exact description, reference being made to the accompanying drawings, in whicl1 Figure l is a longitudinal section of a pocketknife having my improvement. Fig. 2 is a detail inner face view of the spring used in said pocketknife. Figs. 3 and 4c are similar views of modified forms of said spring. Fig. 5 is a cross-section of a modified form ofspring and shell. Fig. 6 is a detail back view of the same. Fig. 7 is a side view thereof, partly in section. Fig. 8 is a perspective view of a pocket-knife having my invention.

The object of this invention is to simplify the connection between the shell or case of a pocket-knife and the back-spring of the same.

The invention consists, in substance, in notching the spring at its faces for the reception of lugs that are formed on the shell, so that the said lugs shall lock the spring, the back of the shell being continuous.

In the drawings,the letter A represents the shell or case of the knife-that is to say, the metal portion thereof-which may afterward on the outer side be ornamented with celluloid or any other suitable substance; but for the purposes of this invention I will refer to said shell only so far as the same is constructed of metal. This shell A consists of the usual The shell A is consides or checks 1) of the shell and bent inward into corresponding notches, e, that are formed in the sides of the spring, as appears in Figs. 2, 3, 4, 5, and 7. This construction allows the spring to be held in the shell without rivets, and prevents its displacement. If any rivet is to be used for securing the spring more firmly, such rivet should be a vertical rivet, as in Fig. 1 at gthat is to say, a rivet that extends through the back of the shell into the spring, and which does not require the spring to have any extra thickness.

Where the knife is intended to receive at one or both ends two or more blades, I use a spring, B, having forked ends, as at h in Figs. 2 and 3, each tine of the fork being, so to speak, a separate spring for a separate blade of the knife and not in contact with the other tine,

and I thus avoid the use ofseries ofspringsin each penknife and hold the tines or independent parts of the same spring in position by the single lug or set of lugs that extend from the shell into the notch ofthe spring. 'When one of the tines is strained, it will not be opposed by frictional contact with other tines. I claim I In apenknife, the shell A, made in one piece with the two cheeks b b, having inwardlyturned lugs 01 and continuous connecting back d, in combination withthe spring B, which is notched at both sides to receive the said lugs, substantially as and for the purpose herein shown and described.

JOHN G. FRIEDMANN. Witnesses:

WILLIAM T. GRAFF, HARRY M. TURK. 

